xxxHOLiC The Movie Summary

Alternative title: xxxHOLiC Movie: A Midsummer Night's Dream, Gekijouban xxxHOLiC Manatsu no Yoru no Yume
Genres: comedy, horror, mystery, supernatural
Summary: Yuko receives an invitation for the opening of an auction from a mysterious unknown sender. Likewise, fanatical collectors are summoned to an old mansion whose owner doesn't make an appearance. One after another, each collector disappears and a number of other strange occurrences happen during the night. The questions of what exactly it is that's being auctioned and who the owner of the mansion is must be solved in order for Yuko and Watanuki to get to the bottom of this.
Taken From: Anime News Network